The Motor Torque is not measured by the Drive. It is calculated from the measurement of Motor Current and the estimated Speed (or measured speed in close loop).
OTR % (Motor Torque) = (Iq / Iqn) * (PhirdRef / Phirn)
Where:
Iq = Current Torque provide by the command to drive motor.
Iqn = Nominal Current Torque computes with the motor name plate
PhirdRef = Flux provide by the command to drive motor
Phirn = Nominal flux of the motor